I'm new here. Just picked up a 90 SC that is bone stock and has been in storage for the past 5 years. Previous owner had the ABS pump rebuilt and then had a hard pedal and ABS light on. After reading on here and reading Duffy's article on it I started tracing wires and checking relays. Long story short....the 4 wire pump wire was not connected and the 5 wire harness to the pressure switch wasn't connected. Plugged everything up and all is well now. No lights and brakes work fine. I was really worried about having to dump a bunch of cash in this thing. I never get breaks like this, so I'm stoked.